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HEART & CIRCULATION

Olive Leaf Extract (Oleuropein)

Blood pressure · immune · cardiovascular

STRONG EVIDENCEVEGANREAD THE RESEARCH
Written to our editorial standards · reviewed against published research· Updated 2 Jun 2026
Last reviewed: May 30, 2026
QUICK ANSWER

Olive Leaf Extract: Blood pressure · immune · cardiovascular. Standardized to oleuropein, the polyphenol behind olive's cardiovascular benefits. Lowers blood pressure modestly but reliably. Standard dose 500 mg, taken in the morning, about $18/month. Evidence rating: strong evidence.

What is Olive Leaf Extract?

Olive leaf extract concentrates the cardioprotective polyphenols of the Mediterranean diet, particularly oleuropein and its breakdown product, hydroxytyrosol, into a single supplement. Clinical trials demonstrate modest but consistent reductions in systolic and diastolic blood pressure, improved LDL oxidation resistance, and supportive effects on immune function. The standardized extract is more potent than olive oil itself for these markers. Standard dose is 500-1000 mg of extract standardized to 15-20% oleuropein, taken with a meal.

WHY IT MATTERS

Standardized to oleuropein, the polyphenol behind olive's cardiovascular benefits. Lowers blood pressure modestly but reliably.

Natural food sources

Where possible, get Olive Leaf Extract from whole foods first. Common dietary sources include:

OlivesExtra-virgin olive oilOlive leaf tea

Where to buy

NOW Foods Olive Leaf Extract 500mg
RECOMMENDED
Now Foods, Olive Leaf Extract
500 mg · Morning · ~$18/month

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Common questions

What is Olive Leaf Extract?
Olive leaf extract concentrates the cardioprotective polyphenols of the Mediterranean diet, particularly oleuropein and its breakdown product, hydroxytyrosol, into a single supplement. Clinical trials demonstrate modest but consistent reductions in systolic and diastolic blood pressure, improved LDL oxidation resistance, and supportive effects on immune function. The standardized extract is more potent than olive oil itself for these markers. Standard dose is 500-1000 mg of extract standardized to 15-20% oleuropein, taken with a meal.
What is Olive Leaf Extract used for?
Blood pressure · immune · cardiovascular. Standardized to oleuropein, the polyphenol behind olive's cardiovascular benefits. Lowers blood pressure modestly but reliably.
What is the standard dose of Olive Leaf Extract?
500 mg, typically taken in the morning. Approximate cost is $18 per month.
How strong is the evidence for Olive Leaf Extract?
Strong evidence for its primary uses. See the full study list on the research page.

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